query with empty span, aggregation and no group by might return no rows

CREATE INDEX ix1 ON default(c1);

insert into default values("1",{"c1":5});

insert into default values("2",{"c1":null});

insert into default values("3",{"c1":null});

curl -v http://Administrator:password@localhost:8093/query/service -H "Content-Type: application/json" -d '{"statement":"prepare p1 from select count(c1) from default where c1 = $name"}'

curl -v http://Administrator:password@localhost:8093/query/service -H "Content-Type: application/json" -d '{"prepared":"p1","$name":null}'